package client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

import java.net.InetSocketAddress;

public class EchoClient {
    private final String host;
    private final int port;

    public EchoClient(String host, int port) {
        this.host = host;
        this.port = port;
    }

    public static void main(String[] args) {
        new EchoClient("localhost", 8088).start();
    }

    public void start() {

        EventLoopGroup eventLoopGroup = new NioEventLoopGroup();

        Bootstrap bootstrap = new Bootstrap();
        bootstrap.group(eventLoopGroup).channel(NioSocketChannel.class).remoteAddress(new InetSocketAddress(host, port)).handler(
                new ChannelInitializer<SocketChannel>() {
                    protected void initChannel(SocketChannel ch) throws Exception {
                        ch.pipeline().addLast(new EchoClientHandler());
                    }
                }
        );

        try {
            ChannelFuture future = bootstrap.connect().sync();
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();

        } finally {
            try {
                eventLoopGroup.shutdownGracefully().sync();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

    }
}
